They say the man seen above approached the 35-year-old victim around 9 p.m. Monday near West 110th Street and Lenox Avenue and offered to walk her home.
While walking in the park, he allegedly took out a knife, assaulted and raped her, and took her purse.
He’s described as about 30 years old, 190 pounds and with black hair.
Police say he was last seen wearing a black long-sleeve shirt, tan pants and brown shoes, and was carrying a black book bag.
Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.